Daily Sunspot Evaluation
Observation Sheet Wednesday, 29 September 1971
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 4
- Number of spots (f)
- 42
- Relative number (R)
- 82
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710929.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 7 | 12 | 72E | 76 | |||
| 2 | C – 15 | -5 | 30E | 118 | |||
| 3 | H – 11 | -5 | 16E | 132 | |||
| 4 | C – 9 | -15 | 44W | 192 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.